The chief recreation in Kidlington appears to be turning the NCN signs round. Which is fair enough, I guess - there's not much else to do in Kidlington. But it does mean that it's kinda hard to find your way through on NCN 51.

Sustrans should use more stickers, they're harder to turn round.

Anyway, we surveyed the western end of NCN 51 today: it was already on OSM as far as the edge of Kidlington (though using an older road route rather than the current, rather enjoyable cross-country path), so we continued from there into the terminus in Oxford, also taking the opportunity to cycle the new link from Tackley railway station. The rural bits were smashing, North Oxford was suitably posh, and about the only sub-par bit was the pavement path along the A4260.